Introduction to pottery water pipes: There are wells near all buildings at the Erlitou site in Yanshi. The wells are rectangular, 1.95 meters long, 1.5 meters wide, and more than 4 meters deep. The well shaft has a smooth straight wall, proving that it is not Cellar. The emergence of ceramic water pipes in the capital was a sign that people were settling down to drink groundwater, and at the same time they were attaching great importance to sewage treatment in urban planning.